Comparison of the REKST model with PLEIK model in performing the antifouling analysis of karstic groundwater:A case study in the Xiangxi Dalongdong underground river

By taking the Xiangxi Dalongdong underground river as a case study area,this paper comparatively analyzes the performance of the REKST and PlEIK models in anti-fouling evaluation in karstic bare-rock areas.Analytical results show that there is a big gap between these two models in terms of their functionalities,particularly in grading and ranking processes,because in these two models their index assignment and weighting methods are different.The REKST model is lack of quantitative index assignment and barrier property grading systems;while the PLEIK has the both,so that the effect of subjective factors on results for PLELK are small.Thus,the PLEIK model is superior to the REKST model in the assessment.